Quick BDC Field Zero | LRU

Published on September 26, 2023
Duration: 2:10

This video provides a quick field method to re-zero a Ballistic Drop Compensating (BDC) turret when atmospheric conditions or ammunition lot variations cause a deviation from the original ballistic calculations. The technique involves adjusting the turret to achieve point of aim/point of impact at a key hunting distance and then physically re-aligning the turret's indicator to that distance, ensuring reliable holdovers for the hunt.

Quick Summary

A quick field fix for an inaccurate BDC turret involves dialing it to your primary hunting distance, achieving point of aim/point of impact, and then physically re-aligning the turret's indicator to that distance by removing and replacing the cap.

Chapters

  1. 00:01Introduction to BDC Turret Issues
  2. 00:07Reasons for BDC Inaccuracy
  3. 00:13Atmospheric Conditions & Ammo Lot Numbers
  4. 00:30Muzzle Velocity Changes
  5. 00:46Quick Field Fix for BDC Turrets
  6. 00:54Laser Target & Dialing Turret
  7. 01:03Achieving Point of Aim/Point of Impact
  8. 01:14Floating the Turret Housing
  9. 01:23Recalibrating the BDC Turret
  10. 01:31Impact on Shooting Distances
  11. 01:37Ideal vs. Field Zeroing
  12. 01:51Addressing Muzzle Velocity Differences
  13. 01:56Field Hasty Long Range Zero
  14. 02:02More Educational Content

Frequently Asked Questions

Why might a BDC turret become inaccurate in the field?

A BDC turret can become inaccurate due to significant changes in atmospheric conditions from its original calibration, using different ammunition lot numbers that alter muzzle velocity, or increased firing that causes velocities to climb.

How can I quickly adjust my BDC turret in the field?

Dial your BDC turret to your primary shooting distance, fire a shot to achieve point of aim/point of impact, then remove the turret cap and re-align the indicator to that distance before replacing the cap.

What is the purpose of 'floating' a BDC turret?

Floating a BDC turret means physically re-aligning its indicator to match the actual point of aim/point of impact achieved through dialing. This recalibrates the turret for current conditions and ammunition.

Does this field adjustment account for all ballistic variables?

This field adjustment primarily addresses deviations at your main shooting distance. While it ensures accuracy for the bulk of your hunting shots, minor errors on very close or extreme ranges might still exist.

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